How can I get the new questions regarding each topic, so that I want share my known answers with them.
What is meta?
- Any Stack Exchange user can ask a question
- The community provides support, votes on ideas, and reports bugs
- Your voice helps shape the way Stack Exchange operates
Browse the tag your are interested in and sort questions by "newest".
So, if you are looking for the newest iphone and ipad questions checkout http://stackoverflow.com/questions/tagged/iphone?sort=newest and http://stackoverflow.com/questions/tagged/ipad?sort=newest.